The project uses the serverless framework to set up an AWS Lambda function which is invoked by an CodePipeline Pipeline Execution State Change Event fired when an AWS CodePipeline's state changes. The event's payload is parsed and pushed to Slack. Thus, pipeline starts, successes and failures are easily and right away visible in Slack.
To deploy the solution an environment variable called SLACK_URL needs to be set to your Slack webhook. It looks like this https://hooks.slack.com/services/1D6AEB699/F4A39D451/jUCfsmDh8l60lMjpamcxQF9b. Use it in the following command
export SLACK_URL="https://hooks.slack.com/services/1D6AEB699/F4A39D451/jUCfsmDh8l60lMjpamcxQF9b" && npm run deploy:prodThe code ships with some tests to check whether the incoming CloudWatch Event is mapped properly to the Slack API. Run them with this command.
npm run test